The QN8027 is a low-power stereo FM transmitter IC designed by Quntic. It is designed for portable audio devices, car audio adapters, and other consumer electronics applications where wireless audio transmission over the FM band is required. The QN8027 integrates all the necessary components for generating a stable and high-quality FM signal from an audio input, including an audio modulator, PLL synthesizer, and output amplifier. It prioritizes low power consumption and ease of integration.

Applications:

• Portable Media Players
• Mobile Phones
• Car FM Transmitters/Adapters
• Wireless Audio Dongles
• PC Audio Transmitters
• DIY Audio Projects

Features:

• Stereo Audio Input: Supports stereo audio transmission.
• Low Power Consumption: Extends battery life in portable devices.
• Adjustable Output Power: Allows optimization of transmission range and power consumption.
• Wide Frequency Range: Covers the full FM broadcast band (76-108 MHz).
• Integrated PLL Synthesizer: Provides stable and accurate frequency generation.
• Pre-emphasis Function: Improves audio quality by compensating for noise.
• Low Harmonic Distortion: Ensures clean and clear audio transmission.
• I2C Interface: Enables easy control and configuration.
• Compact Package: Suitable for integration into space-constrained devices.

Benefits:

• Wireless Audio Streaming: Enables wireless transmission of audio to FM radios.
• Extended Battery Life: Low power consumption optimizes battery performance.
• Easy Integration: Simple design and I2C control facilitate integration into various systems.
• High-Quality Audio: Low distortion and pre-emphasis ensure excellent audio fidelity.
• Flexible Control: Adjustable output power allows for optimizing transmission range.

Additional Details:

The QN8027 operates with a supply voltage typically in the range of 2.7V to 3.6V. The audio input supports standard line-level audio signals. The I2C interface allows programming the transmission frequency and output power. Requires minimal external components, usually consisting of decoupling capacitors and antenna matching networks. Packaging is usually in small SMD formats like QFN or TSSOP to accommodate compact designs.